| Escargot_rouge | |
| Mar 5 2026, 9:47 PM |
| F72626403: Screenrecorder-2026-03-05-22-34-16-499.mp4 | |
| Mar 5 2026, 9:47 PM |
Steps to replicate the issue (include links if applicable):
What happens?:
Sections cannot be expanded
What should have happened instead?:
Sections should be expandable and editable
Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia):
Other information (browser name/version, screenshots, etc.): Opera mobile version 93.4.4906
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Resolved | BUG REPORT | bvibber | T416063 Section collapsing in Parsoid version not resilient in case of slow connections | ||
| Resolved | BUG REPORT | bvibber | T419170 Talk pages on mobile with Parsoid are unusable when there are level 1 headers |
Thanks for the report!
Can confirm this looks like a failure in patches for T416063, my recent changes on parsoid-mode section-opening setup during slow loading:
It looks like legacy will take <h1>s as the sections if they're present, otherwise uses the <h2>s? I'm going to have to double-check the exact behavior of the legacy parser mode and make sure I replicate it correctly when <h1>s are present. :D
@SherryYang-WMF is OOo today so I'm taking the liberty of sticking this regression in the queue for this sprint and assigning it to myself. I might not get to it today but it looks like a simple fix and I expect to be able to push a quick-fix patch monday.
Shouldn't explode anything too badly, other that painting some sections on certain page layouts with disclosure arrows that aren't clickable.
Change #1250639 had a related patch set uploaded (by Bvibber; author: Bvibber):
[mediawiki/extensions/MobileFrontend@master] Revert "Fix for temp section open during slow loads on Parsoid"
Change #1250639 merged by jenkins-bot:
[mediawiki/extensions/MobileFrontend@master] Revert "Fix for temp section open during slow loads on Parsoid"
Change #1250647 had a related patch set uploaded (by Bvibber; author: Bvibber):
[mediawiki/extensions/MobileFrontend@wmf/1.46.0-wmf.18] Revert "Fix for temp section open during slow loads on Parsoid"
Change #1250648 had a related patch set uploaded (by Bvibber; author: Bvibber):
[mediawiki/extensions/MobileFrontend@wmf/1.46.0-wmf.19] Revert "Fix for temp section open during slow loads on Parsoid"
Change #1250647 merged by jenkins-bot:
[mediawiki/extensions/MobileFrontend@wmf/1.46.0-wmf.18] Revert "Fix for temp section open during slow loads on Parsoid"
Change #1250648 merged by jenkins-bot:
[mediawiki/extensions/MobileFrontend@wmf/1.46.0-wmf.19] Revert "Fix for temp section open during slow loads on Parsoid"
Mentioned in SAL (#wikimedia-operations) [2026-03-11T20:10:19Z] <bvibber@deploy2002> Started scap sync-world: Backport for [[gerrit:1250647|Revert "Fix for temp section open during slow loads on Parsoid" (T416063 T419170 T419721)]], [[gerrit:1250648|Revert "Fix for temp section open during slow loads on Parsoid" (T416063 T419170 T419721)]]
Mentioned in SAL (#wikimedia-operations) [2026-03-11T20:12:29Z] <bvibber@deploy2002> bvibber: Backport for [[gerrit:1250647|Revert "Fix for temp section open during slow loads on Parsoid" (T416063 T419170 T419721)]], [[gerrit:1250648|Revert "Fix for temp section open during slow loads on Parsoid" (T416063 T419170 T419721)]] synced to the testservers (see https://wikitech.wikimedia.org/wiki/Mwdebug). Changes can now be verified there.
Mentioned in SAL (#wikimedia-operations) [2026-03-11T20:17:06Z] <bvibber@deploy2002> Finished scap sync-world: Backport for [[gerrit:1250647|Revert "Fix for temp section open during slow loads on Parsoid" (T416063 T419170 T419721)]], [[gerrit:1250648|Revert "Fix for temp section open during slow loads on Parsoid" (T416063 T419170 T419721)]] (duration: 06m 47s)
@bvibber were you able to replicate this issue? I can't replicate it locally with https://gerrit.wikimedia.org/r/c/mediawiki/extensions/MobileFrontend/+/1251120 checked out.
Change #1251546 had a related patch set uploaded (by Bvibber; author: Bvibber):
[mediawiki/extensions/MobileFrontend@master] WIP Reworked fix for temp section open during slow loads on Parsoid
The setup code did add the extra chevrons on the h2s, and the click code did fail on the h1 and thus not expand it. So I _think_ i've correctly replicated the issue, and the attached video is showing related error aftermath. :D
A locally duplicated page _seems_ to work correctly with the new patch on
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/MobileFrontend/+/1251546
(page containing both <h1> and == headings)
Change #1251546 merged by jenkins-bot:
[mediawiki/extensions/MobileFrontend@master] Reworked fix for temp section open during slow loads on Parsoid